Self−Ventilated Motors - Lenze 9300 vector Série Instructions De Montage

2.2.2 Self−ventilated motors
Due to the construction, self−ventilated standard motors are exposed to an increased heat
generation in the lower speed range compared to forced ventilated motors.
J
Warnings!
For complying with the UL 508C standard, you have to set the
speed−dependent evaluation of the permissible torque via code C0129/x.
Parameter setting
The following codes can be set for I
Code
C0066
C0120
C0127
C0128
C0606
C0129/1
C0129/2
Effect of code C0129/x
I / I N
1.1
1.0 3
0.9
0.8
0
0.7
C0129/1
0.6
0
0 0.1
Fig. 2−2
The lowered speed / torque characteristic (Fig. 2−2) reduces the permissible thermal load
of self−ventilated standard motors. The characteristic is a line the definition of which
requires two points:
Point 0: Definition with C0129/1
ƒ
This value also enables an increase of the maximally permissible load.
Point 1: Definition with C0129/2
ƒ
With increasing speeds, the maximally permissible load remains unchanged
(I = I
Mot
In Fig. 2−2, the motor speed and the corresponding permissible motor torque (3) can be
read for each working point (2on the characteristic (0) ... 1). 3 can also be calculated
using the values in C0129/1and C0129/2 (evaluation coefficient "y", ¶ 130).
EDKVF9333V DE/EN/FR 7.2
Meaning
2
Display of the I x t load of the motor
Threshold: Triggering of error "OC6"
Threshold: Triggering of error "OC8"
Thermal motor time constant
Response to error "OC8"
S1 torque characteristic I /I
1 rated
S1 torque characteristics n /n
2
1
C0129/2
2
0.2 0.3 0.4
0.132
Working point in the range of characteristic lowering
).
rated
l
Safety instructions
Thermal motor monitoring
Self−ventilated motors
2
x t monitoring:
Value range
0 ... 250 %
0 ... 120 %
0 ... 120 %
0.1 ... 50.0 min
TRIP, warning, off
10 ... 200 %
10 ... 200 %
rated
n / n N
2
Lenze setting
−
0 %
0 %
5.0 min
Warning
100 %
40 %
9300STD350
129